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Ordering number : ENN6630
Monolithic Linear IC
LA4743B
45 W Four-Channel (Bridge Circuit) Power Amplifier
Overview
The LA4743B is a 45 W 4-channel power amplifier IC for car stereo systems. It features a built-in bridge circuit and the ability to radically reduce the number of external components required. It is also pin compatible with the LA4743A, which differs in the amount of gain provided.
Package Dimensions
unit: mm 3236-HZIP25
[LA4743B]
29.2 25.6 4.5
Features
· Maximum output power: 45 W × 4 channels (VCC = 14.4 V, 4 load, 1 kHz) · 40 W × 4 channels (VCC = 13.7 V, 4 load, 1 kHz) · Requires only seven external components and does not require an oscillation prevention RC circuit, a noise filter, or a BS capacitor.
R1.7 14.4 17.4 3.3 10.2
0.4 4.0 4.0
2.60 2.0
(1.0) 2.0
0.53
Functions
· Muting function · Built-in standby switch · Full complement of built-in protection circuits, including protection from shorting to VCC, shorting to ground, load shorting, overvoltages, and overheating.
SANYO: HZIP25
Specifications
Maximum Ratings at Ta = 25°C
Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Package thermal resistance Symbol VCC max1 VCC max2 IOpeak Pd max Topr Tstg jc With an arbitrarily large heat sink Signal present No signal (for 1 minute) Conditions Ratings 18 26 4.5/ch 50 40 to +85 40 to +150 1 Unit V V A W °C °C °C/W
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3100RM (OT) No. 6630-1/9
LA4743B Operating Conditions at Ta = 25°C
Parameter Recommended supply voltage Recommended load resistance Operating supply voltage range Symbol VCC RL VCC op Conditions Ratings 14.4 4 9 to 18 Unit V V
Operating Characteristics at Ta = 25°C, VCC = 14.4 V, f = 1 kHz, RL = 4 , Rg = 600
Parameter Quiescent current Standby current Output offset voltage Voltage gain Voltage gain difference Symbol ICCO Ist VNoffset VG VG PO1 Output power PO max1 PO max2 Total harmonic distortion Channel separation Ripple rejection ratio Output noise voltage Muting attenuation THD CHsep SVRR VNO Mute(att) THD = 10 % VCC = 13.7 V, VIN = 5 Vrms VIN = 5 Vrms PO = 4 W VO = 0 dBm, Rg = 10 k fr = 100 Hz, VR = 0 dBm, Rg = 0 Rg = 0, B.P.F. = 20 Hz to 20 kHz VO = 20 dBm 70 50 43 RL = , Rg = 0 Vst = 0 V Rg = 0 VO = 0 dBm 150 31 1 23 28 40 45 0.1 60 50 250 80 450 0.4 32 Conditions Ratings min 100 typ 200 max 350 10 +150 33 +1 Unit mA µA mV dB dB W W W % dB dB µVrms dB
No. 6630-2/9
LA4743B Sample Application Circuit and Block Diagram
2200 µF VCC1/2 6
+
+
0.022 µF
VCC3/4 20
IN 1
11 0.22 µF TAB 1
+
+
9
OUT 1+
Protective Circuit
7
OUT 1 PWR GND 1
8
+
+
5
OUT 2+
IN 2
12 0.22 µF
+
3
OUT 2 PWR GND 2
2 ST BY 4 +5 V ST ON R.F 47 µF
+ +
Standby Switch Ripple Filter Mute Circuit Mute 22 3.3 µF
+
10 k
10
IN 3
15 0.22 µF N.C 25
+
+
17
OUT 3+
Low Level Mute ON
Protective Circuit
19
OUT 3 PWR GND 3
PRE GND
13
18
+
+
21
OUT 4+
IN 4
14 0.22 µF ON TIME C 22 µF
+
+
Muting & ON Time Control Circuit
23
OUT 4 PWR GND 4
16
24
Top view
A13503
No. 6630-3/9
LA4743B Pin Functions and Equivalent Circuits at VCC = 14.4 V, ST-BY = 5 V
Pin No. 1 2 8 18 24
VCC 130
Function TAB
DC voltage [V]
Notes
Internal equivalent circuit
POWER GND
3 5 7 9 17 19 21 23
OUT2 +OUT2 OUT1 +OUT1 +OUT3 OUT3 +OUT4 OUT4
130
Low saturation voltage circuit 2.7
3 5 7 9 17 19 21 23
A13504
10 k 4
4
ST-BY
· The amplifier will be on when the applied voltage is between 2 V and VCC.
30 k
1.5 k
A13505
6 20
VCC1/2 VCC3/4
Bias circuit ST-BY power supply line
Input amplifier ST-BY power supply line
10
SVR
13.2
· Low ripple power supply line for all internal IC blocks
VCC
200
200 1 k
10
A13506
Continued on next page.
No. 6630-4/9
LA4743B
Continued from preceding page.
Pin No. Function DC voltage [V] Notes Input amplifier ST-BY power supply line
5 pF
Internal equivalent circuit
11 12 14 15
IN1 IN2 IN4 IN3
11 12 14 15
VREF
30 k
1 k
3.1
· Input amplifiers that require no capacitor in the input noise filter.
100
Inverter amplifier
A13507
13
PRE GND Bias circuit power supply line
20 k
VREF 2 k
· Amplifier turn-on time control circuit 16 ON TIME MUTE 2.6 · Impulse noise prevention circuit · With a 22 µF capacitor, the turn-on time will be 0.6 s.
16 200 10 k
2 k
40 k
13 k
A13508
Input amplifier ST-BY power supply line
3 k
1 k
22
MUTE
4.1
· The muting function is activated when the applied voltage is under 1 V.
VREF
100 22 7.5 k 10 k
Amplifier bias circuit
VREF 100 k
A13509
25
N.C.
No. 6630-5/9
LA4743B Notes on Usage and Handling · Oscillator stabilization time In some cases, details of the printed circuit board layout may lead to induced parasitic oscillation. This oscillation can be prevented by adding any one of the following components. Verify the optimal values for these capacitors by testing in actual end products. Technique 1 ... Connect Mylar capacitors (0.1 µF) between the BTL amplifier outputs. Technique 2 ... Connect an RC circuit (2.2 and 0.1 µF in series) between each output and ground. · Audio quality (low band) The low-band frequency characteristics can be improved by adjusting the values of the input capacitors. The recommended value is 2.2 µF. · Impulse noise The LA4743B includes a built-in impulse noise suppression circuit. However, further improvement can be achieved by using the muting circuit. When first applying power, activate the muting function at the same time as applying power. Then, after the output DC potential has stabilized, turn off the muting function. When turning off the power, first activate the muting function and then turn off the power. Sample transient responses are attached (see the timing charts). Transient Responses at Power On Power on: Standby and muting activated at the same time. Muting is turned off after the output has stabilized.
5 [V]
External 10 k muting switch
MUTE
0
MUTE OFF
Standby set high
5 [V]
Standby pin
0 [V]
4
Output pin
2
Mute 10 k 22
0
3.3 µF
+
ON TIME
200 ms/div
Transient Responses at Power Off Power off: After activating the muting circuit, turn the power off.
5 [V]
0
External 10 k muting switch
MUTE
5 [V]
0 [V]
Standby set low
4
Standby pin
2
Output pin
Mute 10 k 22 3.3 µF +
0
200 ms/div
No. 6630-6/9
LA4743B
ICCO, VN -- VCC
RL = Open Rg = 0 Vst = 5 V
O I CC
300
5
Quiescent current, ICCO -- V
Output power, PO -- W
4
Output pin voltage, VN -- V
250
100 7 5 3 2 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2
PO -- VIN
VCC = 14.4 V RL = 4 f = 1 kHz Rg = 600 VG = 26 dB All channels driven
200
3 150
VN
2
100
I CCO
50
VN
1
0 0
5
10
15
20
0 25
0.01 10
2
3
5
7 100
2
3
5
7 1k
2
3
5
7 10k
Supply voltage, VCC -- V
48 44 40
Input level, VIN -- mVrms
100 7 5 3 2 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 2 3 5 7 1 2 3 5 7 10 2 3 5 7 100
PO -- VCC
RL = 4 f = 1 kHz Rg = 600 THD = 10 % All channels driven
THD -- PO
VCC = 14.4 V RL = 4 f = 100 Hz Rg = 600 All channels driven
36 32 28 24 20 16 12 8 4 8
Total harmonic distortion, THD -- %
Output power, PO -- W
OUT2, 4
OUT1, 3
10
12
14
16
18
20
0.01 0.1
Supply voltage, VCC -- V
100 7 5 3 2 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 2 3 5 7 1 2 3 5 7 10 2 3 5 7 100
Output power, PO -- W
100 7 5 3 2 10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 2 3 5 7 1 2 3 5 7 10 2 3 5 7 100
THD -- PO
VCC = 14.4 V RL = 4 f = 1 kHz Rg = 600 All channels driven
THD -- PO
VCC = 14.4 V RL = 4 f = 10 kHz Rg = 600 All channels driven
Total harmonic distortion, THD -- %
0.01 0.1
Output power, PO -- W
Total harmonic distortion, THD -- %
0.01 0.1
Output power, PO -- W
THD -- f
Total harmonic distortion, THD -- %
10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7100k
f -- Response
4 2
VCC = 14.4 V RL = 4 Rg = 600 PO = 2 W All channels driven
0
2.2 µF
Response -- dB
2
OU
T2,
4
4
OUT1, 3
0.2
2µ F
6
8 10 10
0.01
VCC = 14.4 V RL = 4 Rg = 600 VO = 0 dBm at f = 1 kHz All channels driven
2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7100k
Input frequency, f -- Hz
Input frequency, f -- Hz No. 6630-7/9
LA4743B
CH Sep -- f
0
CH Sep -- f
Channel separation, CH Sep -- dB
VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm
0
Channel separation, CH Sep -- dB
20
20
VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm
40
40
1
60
3 12
2
4 21
14
60
23
80
80
100 10
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
100 10
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
Input frequency, f -- Hz
Input frequency, f -- Hz
CH Sep -- f
0
CH Sep -- f
Channel separation, CH Sep -- dB
VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm
0
Channel separation, CH Sep -- dB
20
20
VCC = 14.4 V RL = 4 Rg = 10 k VO = 0 dBm
40
3
1 34
40
4
2
43
60
32
41
60
80
80
100 10
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
100 10
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
Input frequency, f -- Hz
1
Input frequency, f -- Hz
VNO -- Rg
Ripple rejection ratio, SVRR -- dB
VCC = 14.4 V RL = 4 DIN AUDIO
SVRR -- fr
0
Output noise voltage, VNO -- mVrms
7 5 3 2
20
VCC = 14.4 V RL = 4 Rg = 0 VCCR = 0 dBm
40
0.1 7 5 3 2
60
80
0.01 10
2 3
5 7 100
2 3
Input resistor, Rg --
5 7 1k
2 3
5 7 10k
2 3
5 7100k
100 10
2 3
5 7100
2 3
5 7 1k
2 3
5 710k
2 3
5 7100k
Ripple frequency, fr -- Hz
100 300
100 7 5
Pd, ICC -- PO
VCC = 14.4 V RL = 4 Rg = 600 f = 1 kHz All channels driven
ICCO -- Ta
VCC = 14.4 V RL = OPEN Rg = 0
Quiescent current, ICCO -- mA
250
Power dissipation, Pd -- W
3 2
Pd
[W
]
[A]
10
Current drain, ICC -- A
200
10 7 5 3 2
I CC
150
1
100
50
1 0.01 2 3
5 7 0.1
2 3
5 7 1
2 3
5 7 10
2 3
0.1 5 7 100
0 60
40
20
0
20
40
60
80
100
Output power, PO -- W
Ambient temperature, Ta -- °C No. 6630-8/9
LA4743B
THD -- Ta
Total harmonic distortion, THD -- %
10 7 5 3 2 1 7 5 3 2 0.1 7 5 3 2 0.01 60 40 20 0 20 40 60 80 100
VCC = 14.4 V RL = 4 Rg = 600 f = 1 kHz PO = 2 W All channels driven
Ambient temperature, Ta -- °C
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of October, 2000. Specifications and information herein are subject to change without notice. PS No. 6630-9/9